EP0899467A1 - Security and fixing mechanism - Google Patents

Security and fixing mechanism Download PDF

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Publication number
EP0899467A1
EP0899467A1 EP98902746A EP98902746A EP0899467A1 EP 0899467 A1 EP0899467 A1 EP 0899467A1 EP 98902746 A EP98902746 A EP 98902746A EP 98902746 A EP98902746 A EP 98902746A EP 0899467 A1 EP0899467 A1 EP 0899467A1
Authority
EP
European Patent Office
Prior art keywords
shape
strip
ratchet
holes
latch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP98902746A
Other languages
German (de)
French (fr)
Other versions
EP0899467B1 (en
Inventor
Vicente Matali Badia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VMB Espanola SA
Original Assignee
VMB Espanola SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VMB Espanola SA filed Critical VMB Espanola SA
Publication of EP0899467A1 publication Critical patent/EP0899467A1/en
Application granted granted Critical
Publication of EP0899467B1 publication Critical patent/EP0899467B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10—Telescoping systems
    • F16B7/105—Telescoping systems locking in discrete positions, e.g. in extreme extended position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32467—Telescoping members
    • Y10T403/32475—Telescoping members having detent
    • Y10T403/32508—Telescoping members having detent having transverse pin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/59—Manually releaseable latch type
    • Y10T403/598—Transversely sliding pin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7075—Interfitted members including discrete retainer
    • Y10T403/7077—Interfitted members including discrete retainer for telescoping members
    • Y10T403/7079—Transverse pin
    • Y10T403/7088—Sliding pin

Definitions

  • the present invention refers to a new safety and fixing mechanism, mainly intended for elevation towers, wherein a load supporting shape moves inside another fixed shape, said mechanism being used for fastening one to another, allowing for the relative upwards displacement of mobile shape over the fixed shape, not permitting the downwards displacement of mobile shape without acting on said security and fixing mechanism.
  • the known traditional systems are just fixing mechanisms, as they are used to fix the telescopic movement of a tubular shape with respect to another tube, so that when releasing the fixing mechanism both shapes will move freely without limits in their movement. In the case that the elevation forces fail, the mobile shape will fall.
  • Another traditional system widely used consist of mobile and fixed shapes provided with matching memori of holes which can be interconnected by means of stems or pins, such that when passing through a pair of matching holes the relative displacement of both shapes will be avoided. In this case there still is the risk as mentioned above since very often the pins used are not of the adequate size or theyr are not in good working condition.
  • a very similar case occurs when an open flange is applied on one of these shapes the other shape being fastened by means of a screw pressure, said screw being actuated by means of a handle or knob.
  • the pressure exerted by the screw causes the fastening of one shape onto the other, but always having the risk of a loss of pressure due to corrosion or friction in the device.
  • This mechanism basically comprises a strip perforated according to a given configuration, fastened to a shape and a ratchet system, matching the holes in the plate, which engages with said holes, said ratchet system being fixed to the exterior shape.
  • It consist of a mechanism developed to lock a tubular shape telescopically arranged inside another tubular shape so that the interior shape may only moves upwards since said mechanism prevents the donwards displacement of said interior shape. Also, said mechanism can be released so that the interior shape can be displaced downwards.
  • the present fixing system is a safety system, the release of said mechnism being produced by the latch displacement, leaving the ratchet ready to be introduced into next adjacent hole in the case that the elevation force fails to act and preventing the interior shape to fall down. When the elevation force acts again, the interior profile will move upwards without any help. Therefore this mechanism operates on a positive safety basis.
  • the fastening is obtained by means of strip provided with a series of holes of a special configuration and fastened to the shape which is to be secured.
  • the ratchet as well as the perforated strip have specific construction details.
  • ratchet (1) with a support (2), engaged to a strip (3) by means of holes or drills (4) with an ratchet element (5) sliding over said strip (3) pushed by a spring (6).
  • This mechanism being mounted on a fixed shape (7), acting and fixing another moving shape (8).
  • the ratchet (1) comprises an element (5), prefrably solid, machined, provided with a latch (9), and a flat end portion (10), and is pushed by means of a spring (6) or similar, said spring (6) exerting a pressure over said flat portion against the moving shape (8) surface (11), which is to be secured when the ratchet (1) is inserted into one of the strip (3) holes (4), said strip being fastened by any known system to said mobile shape (8)
  • This flat part (10) is intended to act as a stop to allow for the ratchet (1) element (5) to be inserted in the perforated strip (3) and ensure a correct operation of the latch (9) even in the case that there is a gap between both shapes and to get a maximum shearing strength caused by the strip (3) engaging action, since said strip bears the whole weight of the moving shape (8) plus the weight of the load.
  • the ratchet is guided by a supporting element (2), preferably solid, machined up to said strip (3) in order to ensure its mechanicla strength against any strains in the assembly caused by stresses created during engaging action.
  • the perforated strip (3) comprises a series of through holes (4).
  • Said strip (3) may be provided with holes for the connection to shape by means of rivets, welding, etc.
  • the holes (4) having the preferred configuration as shown in the figures, have a flat portion (12) to act on the latch (9) element (5) and a half circle portion (13) to serve as support for the engaging element.
  • the perforated strip (3) is fastened to the shape (8), leaving a small gap as shown in the figures. This gap is intended to allow for the strip (3) to be supported on the element with a wide safety margin when the safety ratchet (1) element (5) is inserted into engagement holes (4).
  • the latch system (9) and the insertion of said latch in the strip holes (3) is self adjustable relative to possible gaps between the interior tubular shape (8) moving upwards and the exterior shape (7).
  • This self adjustment is produced when the flat end (10) of the ratchet (1) abbuts onto said shape surface (11), always having the same distance between the latch end (9) and the contact line of said latch with the strip (3), thus ensuring a correct system operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)
  • Burglar Alarm Systems (AREA)
  • Casings For Electric Apparatus (AREA)
  • Telephone Function (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Safety Valves (AREA)

Abstract

Security and fixing mechanism, of the spring and pull type, based on a plate provided with orifices in a special configuration, and fixed to the section which is to be secured and wherein a slip bolt is slided through said orifices by means of a slip formed in the pawl, in the upward direction of the section, and keyed into said orifices when the section is in the downward direction, whether it is intentional or unintentional.

Description

  • The present invention refers to a new safety and fixing mechanism, mainly intended for elevation towers, wherein a load supporting shape moves inside another fixed shape, said mechanism being used for fastening one to another, allowing for the relative upwards displacement of mobile shape over the fixed shape, not permitting the downwards displacement of mobile shape without acting on said security and fixing mechanism.
  • The known traditional systems are just fixing mechanisms, as they are used to fix the telescopic movement of a tubular shape with respect to another tube, so that when releasing the fixing mechanism both shapes will move freely without limits in their movement. In the case that the elevation forces fail, the mobile shape will fall.
  • An example of these traditional systems is the typical bolt mechanism, which is fixed and released by hand, not having a safety system in it. This implies the risk of accidents due to falls of parts of equipment what may cause damages to persons and materials.
  • Another traditional system widely used consist of mobile and fixed shapes provided with matching serie of holes which can be interconnected by means of stems or pins, such that when passing through a pair of matching holes the relative displacement of both shapes will be avoided. In this case there still is the risk as mentioned above since very often the pins used are not of the adequate size or theyr are not in good working condition.
  • A very similar case occurs when an open flange is applied on one of these shapes the other shape being fastened by means of a screw pressure, said screw being actuated by means of a handle or knob. The pressure exerted by the screw causes the fastening of one shape onto the other, but always having the risk of a loss of pressure due to corrosion or friction in the device.
  • With the safety and fixing mechanism object of the present invention it is intended to avoid these problems in a simple, precise, efficient manner.
  • This mechanism basically comprises a strip perforated according to a given configuration, fastened to a shape and a ratchet system, matching the holes in the plate, which engages with said holes, said ratchet system being fixed to the exterior shape.
  • It consist of a mechanism developed to lock a tubular shape telescopically arranged inside another tubular shape so that the interior shape may only moves upwards since said mechanism prevents the donwards displacement of said interior shape. Also, said mechanism can be released so that the interior shape can be displaced downwards.
  • The present fixing system is a safety system, the release of said mechnism being produced by the latch displacement, leaving the ratchet ready to be introduced into next adjacent hole in the case that the elevation force fails to act and preventing the interior shape to fall down. When the elevation force acts again, the interior profile will move upwards without any help. Therefore this mechanism operates on a positive safety basis.
  • In such a case, as a safety system, the fastening is obtained by means of strip provided with a series of holes of a special configuration and fastened to the shape which is to be secured. In other words, the ratchet as well as the perforated strip have specific construction details.
  • The nature of the present invention will be better understood with the following drawings in which:
  • Figure 1 shows an elevation of a fixing and safety system according with present invention in a practical embodiment mounted on shapes.
  • Figure 2 shows a sectional view of the fixing and safety mechanism mounted on shapes.
  • Figure 3 shows schematic views (A, B and C) of the device with different working sequences.
  • As it can be seen in the figures, there is a ratchet (1) with a support (2), engaged to a strip (3) by means of holes or drills (4) with an ratchet element (5) sliding over said strip (3) pushed by a spring (6). This mechanism being mounted on a fixed shape (7), acting and fixing another moving shape (8).
  • The ratchet (1) comprises an element (5), prefrably solid, machined, provided with a latch (9), and a flat end portion (10), and is pushed by means of a spring (6) or similar, said spring (6) exerting a pressure over said flat portion against the moving shape (8) surface (11), which is to be secured when the ratchet (1) is inserted into one of the strip (3) holes (4), said strip being fastened by any known system to said mobile shape (8)
  • This flat part (10) is intended to act as a stop to allow for the ratchet (1) element (5) to be inserted in the perforated strip (3) and ensure a correct operation of the latch (9) even in the case that there is a gap between both shapes and to get a maximum shearing strength caused by the strip (3) engaging action, since said strip bears the whole weight of the moving shape (8) plus the weight of the load.
  • Furthermore, the ratchet is guided by a supporting element (2), preferably solid, machined up to said strip (3) in order to ensure its mechanicla strength against any strains in the assembly caused by stresses created during engaging action.
  • The perforated strip (3) comprises a series of through holes (4). Said strip (3) may be provided with holes for the connection to shape by means of rivets, welding, etc. The holes (4) having the preferred configuration as shown in the figures, have a flat portion (12) to act on the latch (9) element (5) and a half circle portion (13) to serve as support for the engaging element.
  • The size and proportions of these holes (4) and the ratchet (1) elements will depend on the load conditions and materials in order to ensure a fully reliable engagement.
  • The perforated strip (3) is fastened to the shape (8), leaving a small gap as shown in the figures. This gap is intended to allow for the strip (3) to be supported on the element with a wide safety margin when the safety ratchet (1) element (5) is inserted into engagement holes (4).
  • The operation is simple as it can be seen in the enclosed figures, mainly in figure 3, where the arrows show the direction of the displacement of the moving shape (8) and the ratchet (1) element (5) which is fastened to the fixed shape (7).
  • Starting from a resting position, when applying a force to elevate the shape (8) to raise a load (not shown in the figure), when the element (5) is inserted in a hole (4, figure 3A) of the strip (3), the flat part (9) will slide slowly over the shape (8) surface (11), as a result of the pressure exerted by the spring (6) acting against this surface, so that the latch meets the flat portion (12) of the hole (4) forcing the latch, and with it the whole element, towards the exterior against the spring (6) pressure.
  • Once the shape (8) gets to that position, it will continue moving upwards, and tha element flat surface (9) will slide over the strip surface (3, figure 3B), to reach next hole (4) where by the spring pressure (6) this element will be positioned in said hole (figure 3C) and so on while the shape (8) is displaced upwards.
  • In this last position (figure 3C) if the shape (8) did not move further, then the shape, forced by its own weight, will move downwards so that the curved surface (13) of hole (4) meets the element (5) which will bear the whole weight preventing the fall and acting as a safety element. If the elevating force happens to fail while the element (5) slides over the strip (3) surface, not over surface (11), then the shape (8) would get loose until said element (5) gets inserted in next through hole (4).
  • Therefore, when the tubular shape is moving upwards, the ratchet slides and allows for that movement, but when the elevation force stops, then the ratchet is engaged in next hole, thus preventing a possible return This operation prevents the sahpe (8) from moving downwards from any position due to the automatic engagement of the ratchet element (5), in each hole (4) met. It will be only possible to lower the interior shape (8) by releasing and holding the ratchet in order to release the perforated strip (3) fastened to said shape.
  • The latch system (9) and the insertion of said latch in the strip holes (3) is self adjustable relative to possible gaps between the interior tubular shape (8) moving upwards and the exterior shape (7). This self adjustment is produced when the flat end (10) of the ratchet (1) abbuts onto said shape surface (11), always having the same distance between the latch end (9) and the contact line of said latch with the strip (3), thus ensuring a correct system operation.
  • Once the nature of present invention as well as a practical embodiment of the same have been fully described, it is only to be added that its shape, materials and arrangement can be modified as long as these modifications do not alter basically the features which are claimed as follows:

Claims (5)

  1. Fixing and safety mechanism, characterized in that it comprises basically a ratchet which is mounted on a fixed shape, said ratchet being provided with an element activated by a spring, said element engaging in the holes made in a strip which is fastened to a shape moving relative to a fixed shape, with a small gap between said perforated strip and the shape to which it is fastened, allowing for the shape displacement upwards as the ratchet element slides over the perforated strip surface.
  2. Fixing and safety mechanism, according to first claim, characterized in that said ratchet element is provided with a latch whic when sliding over the perforated strip when said strip is moving upwards said latch gets in contact with the holes stepping over the lower edge of said holes.
  3. Fixing and safety mechanism, according to first claim, characterized in that this ratchet element has a flat portion which is in permanent contact with the perforated strip or the moving shape surface in the perforated parts of said shape, sliding over those surfaces by the pressure of a spring while the shape moves upwards.
  4. Fixing and safety mechanism, according to all previous claims, characterized in that the perforated strip has a series of through holes, said holes having a flat portion where the latch meets the hole and a half circle portion where the latch gets engaged on its engaging operation.
  5. Fixing and safety mechanism, according to claims 1 and 4, characterized in that said engaging element is capable of allowing for the shape moving upwards by sliding its flat portion and the sliding of a portion of the latch and engaging against the perforated strip in the nearest through hole when this moving shape stops and tends to fall, preventing same from falling.
EP98902746A 1997-02-25 1998-02-17 Security and fixing mechanism Expired - Lifetime EP0899467B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ES9700039 1997-02-25
ES009700398A ES2143360B1 (en) 1997-02-25 1997-02-25 FIXING AND SECURITY MECHANISM
PCT/ES1998/000033 WO1998038432A1 (en) 1997-02-25 1998-02-17 Security and fixing mechanism

Publications (2)

Publication Number Publication Date
EP0899467A1 true EP0899467A1 (en) 1999-03-03
EP0899467B1 EP0899467B1 (en) 2004-01-28

Family

ID=8298391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98902746A Expired - Lifetime EP0899467B1 (en) 1997-02-25 1998-02-17 Security and fixing mechanism

Country Status (6)

Country Link
US (1) US6398445B1 (en)
EP (1) EP0899467B1 (en)
AT (1) ATE258656T1 (en)
DE (1) DE69821297T2 (en)
ES (2) ES2143360B1 (en)
WO (1) WO1998038432A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042019A4 (en) * 2013-09-06 2017-04-26 Wing Enterprises, Inc. Adjustable ladders, ladder components and related methods
CN111270964A (en) * 2020-01-20 2020-06-12 重庆峨克门窗幕墙工程有限公司 Fire-resistant window

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US6854694B1 (en) * 2003-11-03 2005-02-15 Wayne Van Etten Tube retainer
US9790708B2 (en) * 2004-02-24 2017-10-17 D & D Group Pty. Ltd. Magnetic latch
US20070000714A1 (en) * 2005-06-29 2007-01-04 Ching-Yao Lin Assembling structure of a frame of a cart for use by handicapped and elderly persons
US7520542B1 (en) * 2006-09-18 2009-04-21 Ecp Family Properties, Llc Childproof gate latch
US8104987B2 (en) * 2009-06-25 2012-01-31 Johnson Health Tech Co. Ltd. Self-locating engagement pin locking and unlocking apparatus
US8667875B2 (en) * 2011-05-31 2014-03-11 Robert Bosch Gmbh Accessory retention device for a rotary impact tool
US8662794B2 (en) 2011-07-27 2014-03-04 Hubbell Incorporated Helical pile adapter
US20140215924A1 (en) * 2011-08-17 2014-08-07 Safergate Group Pty Ltd Gate latch
US8641328B2 (en) 2012-01-20 2014-02-04 Hubbell Incorporated Alignment window for drive tool assembly
US9707448B2 (en) 2012-08-08 2017-07-18 Hoist Fitness Systems, Inc. Exercise machine with movable user support
CN104912884B (en) * 2015-06-18 2017-12-19 昆山泓杰电子股份有限公司 Can the free telescopic column mechanism of self-locking type
US10066759B1 (en) * 2016-04-04 2018-09-04 Bnsf Railway Company Locking / indexing pin
US10662686B2 (en) 2016-09-30 2020-05-26 Barrette Outdoor Living, Inc. Magnetic safety gate latch
CN106926889B (en) * 2017-03-15 2024-01-09 闵远超 Baby carriage frame with small folding volume
US10919556B2 (en) * 2018-05-09 2021-02-16 B&B Steel Products Stackable and rollable carts and processes for assembling same
US11291883B2 (en) 2019-12-26 2022-04-05 Nautilus, Inc. Tilt-enabled bike with tilt-disabling mechanism
CN112376883A (en) * 2020-11-17 2021-02-19 浙江铠甲建筑科技有限公司 Automatic climbing device for scaffold

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US4842311A (en) * 1987-08-03 1989-06-27 Creative Light & Sound Corporation Safety latch
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3042019A4 (en) * 2013-09-06 2017-04-26 Wing Enterprises, Inc. Adjustable ladders, ladder components and related methods
US10233693B2 (en) 2013-09-06 2019-03-19 Wing Enterprises, Incorporated Adjustable ladders, ladder components and related methods
US11746596B2 (en) 2013-09-06 2023-09-05 Little Giant Ladder Systems, Llc Adjustable ladders, ladder components and related methods
CN111270964A (en) * 2020-01-20 2020-06-12 重庆峨克门窗幕墙工程有限公司 Fire-resistant window
CN111270964B (en) * 2020-01-20 2021-07-20 重庆峨克门窗幕墙工程有限公司 Fire-resistant window

Also Published As

Publication number Publication date
DE69821297T2 (en) 2004-10-21
DE69821297D1 (en) 2004-03-04
ES2143360A1 (en) 2000-05-01
ES2143360B1 (en) 2000-12-01
ATE258656T1 (en) 2004-02-15
EP0899467B1 (en) 2004-01-28
WO1998038432A1 (en) 1998-09-03
US6398445B1 (en) 2002-06-04
ES2218804T3 (en) 2004-11-16

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